High purity alumina or HPA is a high-end product of the non-metallurgical alumina market. It is a high-value product that serves as a base material for the manufacture of sapphire substrates used in various applications such as scratch-resistant artificial sapphire
High purity alumina or HPA is a high-end product of the non-metallurgical alumina market. It is a high-value product that serves as a base material for the manufacture of sapphire substrates used in various applications such as scratch-resistant artificial sapphire